Oil pan drain plug



FIG. 1 is a top and side perspective view of my new oil pan drain plug;

FIG. 2 is a front side elevation;

FIG. 3 is a rear side elevation;

FIG. 4 is a right side elevation;

FIG. 5 is a left side elevation;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view.

The broken lines shown in FIGS. 6 and 7 depict portions of the oil pan drain plug that form no part of the claimed design. 

CLAIM The ornamental design for an oil pan drain plug, as shown and described. 